1. Since fractal dimension itself can reflect the knock intensity, thus it has the functions of knock detection and knock intensity evaluation. 由于分形维数本身可以作为爆震强度指标，因此分形维数兼具爆震检测和爆震强度判别两种功能。
2. Since fractal dimension itself can reflect the knock intensity, thus it has the functions of knock detection and knock intensity evaluation. 由于分形维数本身可以作为爆震强度指标，因此分形维数兼具爆震检测和爆震强度判别两种功能。
3. It shows that the value of fractal dimension gives large change at knock threshold and can be used to evaluate the knock intensity. 研究表明，分形维数在爆震边缘附近变化明显，可以作为爆震强度指标判别爆震边缘。
4. It shows that the value of fractal dimension gives large change at knock threshold and can be used to evaluate the knock intensity. 由于分形维数本身可以作为爆震强度指标，因此分形维数兼具爆震检测和爆震强度判别两种功能。
5. The knock threshold detection is the key of gasoline engine knock detection, and it is the key of the closed loop ignition control of gasoline engines. 汽油机爆震的难点是爆震边缘点检测，爆震边缘点是汽油机点火闭环控制的前提。
